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(No Model.) 2 SheetsSheet 1.

W. H. POTTER. HOOP RIVETING MACHINE. No. 462,775. Patented Nov. 10,1891.

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(No Model.) 2 Sheets-Sheet 2.

W. H. POTTER.

HOOP RIVBTING MACHINE.

No. 462,775. Y Patented Nov. 10, 1891.

ATTORNEYJ'.

WIT/V 8858: IIWEIVTOH UNITED STATES PATENT OFFICE.

WILLIAM H. POTTER, OF BAYONNE, NElV JERSEY, ASSIGNOR OF ONE-HALF TO ALEXANDER GENEREAUX, OF SAME PLACE.

HOOP-RIVETING MACHINE.

SPECIFICATION forming part of Letters Patent No. 462,77 5, dated November 10, 1891.

Application filed May 8, 1891. Serial No. 392,018. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM H. POTTER, of Bayonne, Hudson county, New Jersey, have invented an Improved Hoop-Riv'eting Machine, of which the following is a specification.

This invention relates to a machine for riveting together the two overlapped ends of sheet-metal barrel-hoops.

It consists in the various features of improvement more fully pointed out in the claims.

In the accompanying drawings, Figure l is a vertical longitudinal section of my improved hoop-riveting machine on the line 00 m, Fig. 2; Fig. 2, a top view thereof; Fig. 3,a

front elevation of the machine; Fig. 4, a detail section on line y 3 Fig. 2; and Fig 5, a

detail front view of the feeding-tube g.

The letter a represents the frame of the machine, provided with the bearings a, that support the power-shaft b, driven from pulley b, and provided With a fly-wheel b To the shaft Z) there is keyed a wheel 0, provided with a series of curved radial spokes or arms 0. Each spoke is provided at its end with a laterally-projecting pin 0 surrounded by a collar 0 and adapted to bear upon the hammer-shank d to oscillate the same. .This shank cl is pivoted to an upright a of the machine-frame, and is acted upon by an upper springm and a lower spring m. The hammerhead d is connected to the shank d by a laterally-projecting trunnion (1 which is 5 received by slotted arc-shaped guides a on frame a to steady and direct the movement of the hammer. The lower face of the hammer-head d is made with a countersunk diamond-shaped bearing-surface 61 as shown.

In front of the hammer a feed-table or a11- vil e is secured to the machine-frame. This table is provided with two countersunk par allel grooves e 6', adapted for the reception and retention of the rivets f. These rivets are contained in two downwardly-depending tubes g, that open into the wider sides of the countersunk grooves 6', so as to permit the passage of a rivet-head. The tubes 9 have springs g at the bottom that force the rivets 5o upward. Each rivet is provided with a shank and with one head, placed downward as the rivets are inserted into the tubes. The spring will force the shank of the uppermost rivet 'up through the groove e; but the groove is of such a width only above the tube that the rivet-head cannot pass through the groove. The two perforated ends of the hoop h to be united, being properly superposed, are placed over the two rivets on table 6, Figs. 4.- and 5,

so that the rivets project up through the perforations. The hoop, with the rivets, is now pushed by the operator toward the hammerhead. I'lere the grooves e e widen or open, Fig. 2, to liberate the rivet-heads and to no longer lock the rivet-s to the table. When the hoop, with the rivets, has arrived beneath the hammer, the latter will rapidly upset the upper ends of the rivets to form the upper heads on the same. After the heads are thus formed the finished hoop is simply drawn 7o forward and thrown aside, after which the machine is ready for operation on the next hoop.

The machine is preferably operated continuously from the power-shaft and not intermittently.

During the riveting operation the spring m serves to give additional effect to the stroke of the hammer, while the spring m serves to raise the hammer slightly off the work after each stroke.

My improved machine will do a large amount of work, is simple and effective, and can be easily tended.

What I claim is- 8 1. The combination of feed-table 6, having undercut grooves c, with feed-tubes g, that enter the wider sides of the grooves, springs g within thetubes, an upsetting-hammer, and means for operating the same, substantially go as specified.

2. The combination of feed-tubes g with table 6, having grooves e, into which the tubes open, a hammer having pivoted shank and trunnions d arc-shaped guides at the sides of the hammer, that receive the trunnions, and with means for operating the hammer, substantially as specified.

\V. H. POTTER.

Vitnesses:

A. J ONGHMANS. F. v. BRIESEN. 

